Q1 of 6 Page 161

We determine asterism based on the stars seen in the background of the moon.

a. What is meant by the word 'asterism'?


b. In a calendar, 27 December is recorded as Thiruvathira. What does it mean?

(a) The time taken by the moon to move 1/27th of its path of revolution is called asterism. It is a star pattern that may be contained within a single constellation or consists of stars belonging to different constellation.

For example: The Big and Little Dippers


(b) Thiruvathira is a star.


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